Hydrochemical Characteristics And Source Determination Of The Inrush Water In Sijiaying Iron Mine

Since the construction of Sijiaying iron mine,during the construction of shaft and roadway in the development and mining stage of southern district,there have been many flooding accidents in bedrock section.It is of great theoretical significance and practical value to establish a water inrush early warning system.According to the characteristics of hydrogeological conditions in Sijiaying iron mine,the hydrochemical samples of various water bearing groups were collected,and the characteristics of chemical elements and environmental isotopes of groundwater were used,combined with the multivariate statistical analysis method.The chemical characteristics of groundwater were studied.The research results are as follows:1)The quaternary hydrochemistry in the study area is dominated by Ca-HCO₃,Ca-Mg-HCO₃ and Ca-Mg-HCO₃-SO₄,the conventional ions in the groundwater are mainly derived from leaching.The water chemistry of bedrock is mainly Na-HCO₃ and Na-HCO₃-SO₄,and its water quality is mainly affected by silicate dissolution and cationic alternating adsorption.The chloride ions and sulfate ions in groundwater are mainly affected by industrial and agricultural pollution and mining activities.2)According to the seven indexes of Ca²⁺,Mg²⁺,K⁺,Na⁺,Cl^-,SO₄^2-,and HCO₃^-in the groundwater,combining Bayes theory and stepwise discriminant principle,and the conventional hydrochemical discriminant model of main water-filled aquifers was proposed.3)Research area water filling each aquifer groundwater from atmospheric precipitation,quaternary groundwater for modern water,bedrock fissure water,for modern water,Xinhe fault affected zone of bedrock fissure water accepting lateral bedrock fissure water supply,Dajiazhuang mining district of Tianxing ore district of bedrock fissure water,except by the lateral bedrock fissure water supply,also accepts the quaternary bottom water recharge.Figure 34;Table 9;Reference 90...